if ! has nix_direnv_version || ! nix_direnv_version 2.2.0; then source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.2.0/direnvrc" "sha256-5EwyKnkJNQeXrRkYbwwRBcXbibosCJqyIUuz9Xq+LRc=" fi use flake